Yannick Bisson Detective William Murdoch Actor Helene Joy Dr. Julia Ogden Actor Jonny Harris Constable George Crabtree Actor Thomas Craig Inspector Thomas Brackenreid Actor Lachlan Murdoch Henry Higgins Actor Daniel Maslany Detective Llewellyn Watts Actor Maureen Jennings Writer Cal Coons Writer Alexandra Zarowny Writer R.B. Carney Writer